XmGetPixmapByDepth(library call)										  XmGetPixmapByDepth(library call)

NAME

       XmGetPixmapByDepth -- A pixmap caching function that generates a pixmap, stores it in a pixmap cache, and returns the pixmap

SYNOPSIS

       #include <Xm/Xm.h>
       Pixmap XmGetPixmapByDepth(
       Screen *screen,
       char *image_name,
       Pixel foreground,
       Pixel background,
       int depth);

DESCRIPTION

       XmGetPixmapByDepth  uses  the  parameter  data  to  perform a lookup in the pixmap cache to see if a pixmap has already been generated that
       matches the data. If one is found, a reference count is incremented and the pixmap is returned.	Applications  should  use  XmDestroyPixmap
       when the pixmap is no longer needed.

       screen	 Specifies the display screen on which the pixmap is to be drawn

       image_name
		 Specifies the name of the image to be used to generate the pixmap

       foreground
		 Combines the image with the foreground color to create the pixmap if the image referenced is a bit-per-pixel image

       background
		 Combines the image with the background color to create the pixmap if the image referenced is a bit-per-pixel image

       depth	 Specifies the depth of the pixmap

       If  a matching pixmap is not found, image_name is used to perform a lookup in the image cache. If an image is found, it is used to generate
       the pixmap, which is then cached and returned.

       If an image is not found, image_name is used as a filename, and a search is made for an X10 or X11 bitmap file. If it is found, the file is
       read, converted into an image, and cached in the image cache. The image is then used to generate a pixmap, which is cached and returned.

       If  image_name  has  a  leading	/  (slash),  it specifies a full pathname, and XmGetPixmapByDepth opens the file as specified.	Otherwise,
       image_name specifies a filename.  In this case, XmGetPixmapByDepth looks for the file along a search  path  specified  by  the  XBMLANGPATH
       environment  variable  or  by  a default search path, which varies depending on whether or not the XAPPLRESDIR environment variable is set.
       The default search path contains a lot of directories.  Therefore, XmGetPixmapByDepth will need a relatively long time  to  search  through
       all  these  directories	for pixmaps and bitmaps. Applications that use a lot of pixmaps and bitmaps will probably run more quickly if XBM-
       LANGPATH is set to a short list of directories.	In addition to X bitmap files (XBM), Motif also supports XPM (X Pixmap) file formats, and,
       from version 2.3, JPEG and PNG image formats.  (Note that support of JPEG and PNG image format is an optional feature of Motif, in order to
       check if current version supports PNG ang JPEG image formats the PNG_SUPPORT and JPEG_SUPPORT macros should  be	checked  correspondingly.)
       The  XBMLANGPATH  specifies  the path for both XBM, XPM, PNG and JPEG files. XPM files are described in more detail later in this reference
       page.

       The XBMLANGPATH environment variable specifies a search path for X bitmap files.  It can contain  the  substitution  field  %B,	where  the
       image_name  argument  to  XmGetPixmapByDepth is substituted for %B.  It can also contain the substitution fields accepted by XtResolvePath-
       name.  The substitution field %T is always mapped to bitmaps, and %S is always mapped to NULL.

       If XBMLANGPATH is not set, but the environment variable XAPPLRESDIR is set, the following pathnames are searched:

	  o  %B

	  o  $XAPPLRESDIR/%L/bitmaps/%N/%B

	  o  $XAPPLRESDIR/%l_%t/bitmaps/%N/%B

	  o  $XAPPLRESDIR/%l/bitmaps/%N/%B

	  o  $XAPPLRESDIR/bitmaps/%N/%B

	  o  $XAPPLRESDIR/%L/bitmaps/%B

	  o  $XAPPLRESDIR/%l_%t/bitmaps/%B

	  o  $XAPPLRESDIR/%l/bitmaps/%B

	  o  $XAPPLRESDIR/bitmaps/%B

	  o  $HOME/bitmaps/%B

	  o  $HOME/%B

	  o  /usr/lib/X11/%L/bitmaps/%N/%B

	  o  /usr/lib/X11/%l_%t/bitmaps/%N/%B

	  o  /usr/lib/X11/%l/bitmaps/%N/%B

	  o  /usr/lib/X11/bitmaps/%N/%B

	  o  /usr/lib/X11/%L/bitmaps/%B

	  o  /usr/lib/X11/%l_%t/bitmaps/%B

	  o  /usr/lib/X11/%l/bitmaps/%B

	  o  /usr/lib/X11/bitmaps/%B

	  o  /usr/include/X11/bitmaps/%B

       If neither XBMLANGPATH nor XAPPLRESDIR is set, the following pathnames are searched:

	  o  %B

	  o  $HOME/%L/bitmaps/%N/%B

	  o  $HOME/%l_%t/bitmaps/%N/%B

	  o  $HOME/%l/bitmaps/%N/%B

	  o  $HOME/bitmaps/%N/%B

	  o  $HOME/%L/bitmaps/%B

	  o  $HOME/%l_%t/bitmaps/%B

	  o  $HOME/%l/bitmaps/%B

	  o  $HOME/bitmaps/%B

	  o  $HOME/%B

	  o  /usr/lib/X11/%L/bitmaps/%N/%B

	  o  /usr/lib/X11/%l_%t/bitmaps/%N/%B

	  o  /usr/lib/X11/%l/bitmaps/%N/%B

	  o  /usr/lib/X11/bitmaps/%N/%B

	  o  /usr/lib/X11/%L/bitmaps/%B

	  o  /usr/lib/X11/%l_%t/bitmaps/%B

	  o  /usr/lib/X11/%l/bitmaps/%B

	  o  /usr/lib/X11/bitmaps/%B

	  o  /usr/include/X11/bitmaps/%B

       These paths are	defaults  that	vendors  may  change.	For  example,  a  vendor  may  use  different  directories  for  /usr/lib/X11  and
       /usr/include/X11.

       The following substitutions are used in these paths:

       %B	 The image name, from the image_name argument

       %N	 The class name of the application

       %L	 The display's language string.  This string is influenced by XtSetLanguageProc.  The default string is determined by calling set-
		 locale(LC_ALL, NULL).

       %l_%t	 The language and territory component of the display's language string

       %l	 The language component of the display's language string

       The contents of the file must conform to the rules for X11 bitmap files. In other words, Motif can read any X11 conformant bitmap file.

       The XPM file format is used for storing or getting back colored X pixmaps from files. The XPM  library  is  provided  as  unsupported  with
       Motif. To build applications without XPM, use the NO_XPM macro.	The following shows both XBM and XPM files, respectively, for a plaid pat-
       tern.

       /* XBM file */
       #define plaid_width 22
       #define plaid_height 22
       #define plaid_x_hot -1
       #define plaid_y_hot -1
       static char plaid_bits[] = {
	  0x75, 0xfd, 0x3f, 0xaa, 0xfa, 0x3e, 0x75, 0xfd, 0x3f, 0xaa, 0xfa, 0x3e,
	  0x75, 0xfd, 0x3f, 0xff, 0x57, 0x15, 0x75, 0xfd, 0x3f, 0xaa, 0xfa, 0x3e,
	  0x75, 0xfd, 0x3f, 0xaa, 0xfa, 0x3e, 0x75, 0xfd, 0x3f, 0x20, 0xa8, 0x2b,
	  0x20, 0x50, 0x15, 0x20, 0xa8, 0x2b, 0x20, 0x50, 0x15, 0x20, 0xa8, 0x2b,
	  0xff, 0xff, 0x3f, 0x20, 0xa8, 0x2b, 0x20, 0x50, 0x15, 0x20, 0xa8, 0x2b,
	  0x20, 0x50, 0x15, 0x20, 0xa8, 0x2b};

       /* XPM file */
       static char * plaid[] = {
       /* plaid pixmap
	* width height ncolors chars_per_pixel */
       "22 22 4 2 ",
       /* colors */
       "   c red       m white	s light_color ",
       "Y  c green     m black	s lines_in_mix ",
       "+  c yellow    m white	s lines_in_dark ",
       "x	       m black	s dark_color ",
       /* pixels */
       "x   x	x x x	x   x x x x x x + x x x x x ",
       "  x   x   x   x   x   x x x x x x x x x x x ",
       "x   x	x x x	x   x x x x x x + x x x x x ",
       "  x   x   x   x   x   x x x x x x x x x x x ",
       "x   x	x x x	x   x x x x x x + x x x x x ",
       "Y Y Y Y Y x Y Y Y Y Y + x + x + x + x + x + ",
       "x   x	x x x	x   x x x x x x + x x x x x ",
       "  x   x   x   x   x   x x x x x x x x x x x ",
       "x   x	x x x	x   x x x x x x + x x x x x ",
       "  x   x   x   x   x   x x x x x x x x x x x ",
       "x   x	x x x	x   x x x x x x + x x x x x ",
       "	  x	      x   x   x Y x   x   x ",
       "	  x		x   x	Y   x	x   ",
       "	  x	      x   x   x Y x   x   x ",
       "x x x x x x x x x x x x x x x x x x x x x x ",
       "	  x	      x   x   x Y x   x   x ",
       "	  x		x   x	Y   x	x   ",
       "	  x	      x   x   x Y x   x   x ",
       "	  x		x   x	Y   x	x   ",
       "	  x	      x   x   x Y x   x   x "
       };

RETURN

       Returns a pixmap when successful; returns XmUNSPECIFIED_PIXMAP if the image corresponding to image_name cannot be found.

RELATED

       XmDestroyPixmap(3), XmInstallImage(3), and XmUninstallImage(3).

														  XmGetPixmapByDepth(library call)